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Finding the Fourth Proportional to 349.64, 521.48 and 298.60

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Solution

The fourth proportional to 349.64, 521.48 and 298.60 is: 445.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.64 : 521.48 = 298.60 : x
  2. Step 2: Convert to fraction form
    349.64/521.48 = 298.60/x
  3. Step 3: Cross multiply
    349.64x = 521.48 × 298.60
  4. Step 4: Simplify right side
    349.64x = 155,713.93
  5. Step 5: Solve for x
    x = 155,713.93/349.64
  6. Step 6: Final answer
    x = 445.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.